摘要
面向太阳能热发电系统,建立一种空气-沙子移动床换热器实验平台,对其在不同参数下进行传热性能的实验研究。并基于实验数据,利用线性回归拟合得到表观气固传热系数的关联式,其整个实验工况预测值与实验值的平均误差为3.57%。研究结果表明:较高雷诺数可提升空气-沙子移动床换热器的传热效能,空气进口温度为281℃时,空气-沙子移动床换热器的固相传热效能可达93.56%。当沙子流量不变时,沙子粒径的变化并不会大幅度影响空气-沙子移动床换热器的换热效果。
An experimental platform of air-sand moving bed heat exchanger is established for solar thermal power generation system and the heat transfer performance of air-sand moving bed heat exchanger under different parameters was studied experimentally. Based on the experimental data,the correlation formula of gas-solid heat transfer coefficient is obtained by using linear regression fitting,and the average error between the predicted value and the experimental value of the whole experimental condition is 3.57%. The results show that the higher Reynolds number can improve the heat transfer effectiveness of air-sand moving bed heat exchanger,When the air inlet temperature is 281 ℃,the heat transfer effectiveness of air-sand moving bed heat exchanger can reach 93.56%. When the flow rate of sand is constant,the change of sand particle size will not greatly affect the heat transfer effect of air-sand moving bed heat exchanger.
作者
杨建蒙
孙源敏
侯党员
李斌
孟繁旭
陈海生
Yang Jianmeng;Sun Yuanmin;Hou Dangyuan;Li Bin;Meng Fanxu;Chen Haisheng(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China;Institute of Engineering Thermophysics,CAS,Beijing 100190,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2022年第2期276-281,共6页
Acta Energiae Solaris Sinica
关键词
太阳能热发电
空气-沙子
移动床换热器
传热效能
影响因素
实验研究
solar thermal power generation
air-sand
moving bed heat exchanger
heat transfer effectiveness
influence factors
experimental study
